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            <ol class="post-toc"><li class="post-toc-item post-toc-level-2"><a class="post-toc-link" href="#学习笔记-拥抱Vue"><span class="post-toc-number">1.</span> <span class="post-toc-text">学习笔记 : 拥抱Vue ~</span></a><ol class="post-toc-child"><li class="post-toc-item post-toc-level-3"><a class="post-toc-link" href="#Vue简介"><span class="post-toc-number">1.1.</span> <span class="post-toc-text">Vue简介</span></a></li><li class="post-toc-item post-toc-level-3"><a class="post-toc-link" href="#MVVM介绍"><span class="post-toc-number">1.2.</span> <span class="post-toc-text">MVVM介绍</span></a></li><li class="post-toc-item post-toc-level-3"><a class="post-toc-link" href="#第一个Vue实例"><span class="post-toc-number">1.3.</span> <span class="post-toc-text">第一个Vue实例</span></a></li></ol></li></ol>
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        <h1 class="post-card-title">Hi Vue ~</h1>
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            <time class="post-time" title="2019-07-19 19:35:40" datetime="2019-07-19T19:35:40.000Z"  itemprop="datePublished">2019-07-19</time>

            


            

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            <h2 id="学习笔记-拥抱Vue"><a href="#学习笔记-拥抱Vue" class="headerlink" title="学习笔记 : 拥抱Vue ~"></a>学习笔记 : 拥抱Vue ~</h2><p><em>传统的网站开发一般采用<code>HTML</code>,<code>CSS</code>,<code>JS</code>作为技术架构,而<code>Vue</code>立足于其上,并以模板语法为基础,数据绑定和组件化开发为核心,极大地简化了项目的开发流程 ~</em></p>
<h3 id="Vue简介"><a href="#Vue简介" class="headerlink" title="Vue简介"></a>Vue简介</h3><p><em><code>Vue.js</code>是一套轻量级<code>MVVM</code>框架,由时任前Google工程师(现任阿里Week团队技术顾问)的尤雨溪创造并开源,与其它重量级的框架不同的是,<code>Vue</code>的核心库只关注视图层,并且提供尽可能简单的API以实现数据绑定,组件复用等机制,且非常容易学习并混入其它库. 其Github开源地址 : <a href="https://github.com/vuejs/vue" target="_blank" rel="noopener">https://github.com/vuejs/vue</a></em></p>
<h3 id="MVVM介绍"><a href="#MVVM介绍" class="headerlink" title="MVVM介绍"></a>MVVM介绍</h3><p><em>模型-视图-控制器(<code>Model-View-Controller</code>,MVC)模式,在Web 1.0时代曾被广泛应用于Web架构中,然而其诞生时间比Web早几年,最初,MVC被应用于桌面程序中,然而在PHP,JSP等脚本语言诞生后,也逐渐成为Web开发的主流模式 ! 其<code>MVVM</code>作为<code>MVC</code>的其中一个衍生版本,MVVM主要的目的是分离视图(View)和模型(Model),<code>ViewModel</code>层封装了界面展示和操作的属性的接口. 通过数据绑定,我们可以将View和ViewModel关联一起,当ViewModel中的数据发生变化时,View也会同步进行更新,View与ViewModel之间通过双向绑定(<code>data-binding</code>)建立联系,如下图所示 :</em></p>
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<ul>
<li><em>View : 视图层主要负责展示视图</em></li>
<li><em>ViewModel : 视图-模型层起到桥梁的作用,一方面响应用户事件并向模型层发送请求,另一方面将模型层返回的数据通过数据数据绑定在视图层中展示</em></li>
<li><em>Model : 模型层主要负责处理交互请求并返回响应的数据</em></li>
</ul>
<p><em><code>MVVM</code>模式解耦了视图和模型 : 在模式中,每一个视图都对应一个ViewModel,同时ViewModel与模型建立关联系,当接收到用户请求时,ViewModel获取模型响应数据,并通过数据绑定将相应的视图页面重新渲染. 视图层的数据只需要传入ViewModel即可实现视图层的同步更新,从而实现了视图和模型之间的松散耦合 .</em></p>
<p><em>下面以我的第一个<code>Vue</code>实例为例(具体语法解析见下述哟),简单地解析一下<code>MVVM</code>的各个部分 :</em><br><figure class="highlight html"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br></pre></td><td class="code"><pre><span class="line"><span class="meta">&lt;!DOCTYPE html&gt;</span></span><br><span class="line"><span class="tag">&lt;<span class="name">html</span>&gt;</span></span><br><span class="line">	<span class="tag">&lt;<span class="name">head</span>&gt;</span></span><br><span class="line">		<span class="tag">&lt;<span class="name">meta</span> <span class="attr">charset</span>=<span class="string">"utf-8"</span>&gt;</span></span><br><span class="line">		<span class="tag">&lt;<span class="name">script</span> <span class="attr">src</span>=<span class="string">"resources/vue.js"</span>&gt;</span><span class="tag">&lt;/<span class="name">script</span>&gt;</span></span><br><span class="line">		<span class="tag">&lt;<span class="name">title</span>&gt;</span>first program for Vue<span class="tag">&lt;/<span class="name">title</span>&gt;</span></span><br><span class="line">	<span class="tag">&lt;/<span class="name">head</span>&gt;</span></span><br><span class="line">	<span class="tag">&lt;<span class="name">body</span>&gt;</span></span><br><span class="line">		<span class="tag">&lt;<span class="name">div</span> <span class="attr">id</span>=<span class="string">"app"</span>&gt;</span>&#123;&#123; message &#125;&#125;<span class="tag">&lt;/<span class="name">div</span>&gt;</span></span><br><span class="line">		<span class="tag">&lt;<span class="name">script</span>&gt;</span></span><br><span class="line"><span class="actionscript">			<span class="keyword">var</span> app = <span class="keyword">new</span> Vue(&#123;</span></span><br><span class="line"><span class="actionscript">				el: <span class="string">'#app'</span>,</span></span><br><span class="line">				data: &#123;</span><br><span class="line"><span class="actionscript">					message: <span class="string">'Hello Vue!'</span></span></span><br><span class="line">				&#125;</span><br><span class="line">			&#125;);</span><br><span class="line">		<span class="tag">&lt;/<span class="name">script</span>&gt;</span></span><br><span class="line">	<span class="tag">&lt;/<span class="name">body</span>&gt;</span></span><br><span class="line"><span class="tag">&lt;/<span class="name">html</span>&gt;</span></span><br></pre></td></tr></table></figure></p>
<ol>
<li><p><em>View 层</em></p>
<figure class="highlight html"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line"><span class="tag">&lt;<span class="name">div</span> <span class="attr">id</span>=<span class="string">"app"</span>&gt;</span>&#123;&#123; message &#125;&#125;<span class="tag">&lt;/<span class="name">div</span>&gt;</span></span><br></pre></td></tr></table></figure>
</li>
<li><p><em>ViewModel 层</em></p>
<figure class="highlight html"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br></pre></td><td class="code"><pre><span class="line"><span class="tag">&lt;<span class="name">script</span>&gt;</span></span><br><span class="line"><span class="actionscript"><span class="keyword">var</span> app = <span class="keyword">new</span> Vue(&#123;</span></span><br><span class="line"><span class="actionscript">	el: <span class="string">'#app'</span>,</span></span><br><span class="line">	data: &#123;</span><br><span class="line"><span class="actionscript">		message: <span class="string">'Hello Vue!'</span></span></span><br><span class="line">	&#125;</span><br><span class="line">&#125;);</span><br><span class="line"><span class="tag">&lt;/<span class="name">script</span>&gt;</span></span><br></pre></td></tr></table></figure>
</li>
<li><p><em>Model 层</em></p>
<figure class="highlight html"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br></pre></td><td class="code"><pre><span class="line"><span class="tag">&lt;<span class="name">script</span>&gt;</span></span><br><span class="line">data: &#123;</span><br><span class="line"><span class="actionscript">	message: <span class="string">'Hello Vue!'</span></span></span><br><span class="line">&#125;</span><br><span class="line"><span class="tag">&lt;/<span class="name">script</span>&gt;</span></span><br></pre></td></tr></table></figure>
</li>
</ol>
<h3 id="第一个Vue实例"><a href="#第一个Vue实例" class="headerlink" title="第一个Vue实例"></a>第一个Vue实例</h3><p><em>在这个实例中,初始化了带有’message’数据的’vm’对象,并将其绑定到’id’为’app’的<code>DOM</code>节点上. 初始化时,在实例上绑定的常规数据对象会被Vue转换为被观察的拥有可响应行为的对象,简单点说,就是当数据发生改变时,会同步更新其数据链和作用域中所有的相关状态,例如当实例数据发生改变时,视图也随之变化. 下面就义这个简单的Vue实例为例,简单地解析一下其语法 :</em><br><figure class="highlight html"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br></pre></td><td class="code"><pre><span class="line"><span class="meta">&lt;!DOCTYPE html&gt;</span></span><br><span class="line"><span class="tag">&lt;<span class="name">html</span>&gt;</span></span><br><span class="line">	<span class="tag">&lt;<span class="name">head</span>&gt;</span></span><br><span class="line">		<span class="tag">&lt;<span class="name">meta</span> <span class="attr">charset</span>=<span class="string">"utf-8"</span>&gt;</span></span><br><span class="line">		<span class="tag">&lt;<span class="name">script</span> <span class="attr">src</span>=<span class="string">"resources/vue.js"</span>&gt;</span><span class="tag">&lt;/<span class="name">script</span>&gt;</span></span><br><span class="line">		<span class="tag">&lt;<span class="name">title</span>&gt;</span>first program for Vue<span class="tag">&lt;/<span class="name">title</span>&gt;</span></span><br><span class="line">	<span class="tag">&lt;/<span class="name">head</span>&gt;</span></span><br><span class="line">	<span class="tag">&lt;<span class="name">body</span>&gt;</span></span><br><span class="line">		<span class="tag">&lt;<span class="name">div</span> <span class="attr">id</span>=<span class="string">"app"</span>&gt;</span>&#123;&#123; message &#125;&#125;<span class="tag">&lt;/<span class="name">div</span>&gt;</span></span><br><span class="line">		<span class="tag">&lt;<span class="name">script</span>&gt;</span></span><br><span class="line"><span class="actionscript">			<span class="keyword">var</span> app = <span class="keyword">new</span> Vue(&#123;</span></span><br><span class="line"><span class="actionscript">				el: <span class="string">'#app'</span>,</span></span><br><span class="line">				data: &#123;</span><br><span class="line"><span class="actionscript">					message: <span class="string">'Hello Vue!'</span></span></span><br><span class="line">				&#125;</span><br><span class="line">			&#125;);</span><br><span class="line">		<span class="tag">&lt;/<span class="name">script</span>&gt;</span></span><br><span class="line">	<span class="tag">&lt;/<span class="name">body</span>&gt;</span></span><br><span class="line"><span class="tag">&lt;/<span class="name">html</span>&gt;</span></span><br></pre></td></tr></table></figure></p>
<ol>
<li><p><em>vm : 通过构造函数Vue就可以创建一个Vue的根实例,并启动Vue应用,变量vm就代表这个Vue实例. 例如 :</em></p>
<figure class="highlight html"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br></pre></td><td class="code"><pre><span class="line"><span class="tag">&lt;<span class="name">script</span>&gt;</span></span><br><span class="line"><span class="actionscript"><span class="keyword">var</span> vm = <span class="keyword">new</span> Vue(&#123;</span></span><br><span class="line">	</span><br><span class="line">&#125;);</span><br><span class="line"><span class="tag">&lt;/<span class="name">script</span>&gt;</span></span><br></pre></td></tr></table></figure>
</li>
<li><p><em>el : 实际上,所有代码都是一个对象写入Vue实例(<code>vm</code>)内的. 首先,必不可少的一个选项就是<code>el</code>,其用于指定一个页面中已存在的<code>DOM</code>元素来挂载Vue实例,它可以是HTMLElement,也可以是CSS选择器,挂载成功后继而可以通过<code>vm.$el</code>来访问该元素,例如 :</em></p>
<figure class="highlight html"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br></pre></td><td class="code"><pre><span class="line"><span class="tag">&lt;<span class="name">div</span> <span class="attr">id</span>=<span class="string">"app"</span>&gt;</span><span class="tag">&lt;/<span class="name">div</span>&gt;</span></span><br><span class="line"></span><br><span class="line"><span class="tag">&lt;<span class="name">script</span>&gt;</span></span><br><span class="line"><span class="actionscript"><span class="keyword">var</span> vm = <span class="keyword">new</span> Vue(&#123;</span></span><br><span class="line"><span class="javascript">    el:<span class="built_in">document</span>.getElementById(<span class="string">'app'</span>) <span class="comment">//或:'#app'</span></span></span><br><span class="line">&#125;);</span><br><span class="line"><span class="handlebars"><span class="xml"><span class="tag">&lt;<span class="name">script</span>/&gt;</span></span></span></span><br></pre></td></tr></table></figure>
</li>
<li><p><em>data : 通过Vue实例的data选项,继而配合<code>v-model</code>指令可以声明应用内需要双向绑定的数据,例如 :</em></p>
<figure class="highlight html"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br></pre></td><td class="code"><pre><span class="line"><span class="tag">&lt;<span class="name">input</span> <span class="attr">type</span>=<span class="string">"text"</span> <span class="attr">v-model</span>=<span class="string">"msg"</span> /&gt;</span></span><br><span class="line"></span><br><span class="line"><span class="tag">&lt;<span class="name">script</span>&gt;</span></span><br><span class="line"><span class="actionscript"><span class="keyword">var</span> vm = <span class="keyword">new</span> Vue(&#123;</span></span><br><span class="line"><span class="actionscript">	el: <span class="string">'#app'</span>,</span></span><br><span class="line">	data: &#123;</span><br><span class="line"><span class="actionscript">		msg: <span class="string">'stay hungray,stay foolish ~'</span></span></span><br><span class="line">	&#125;</span><br><span class="line">&#125;);</span><br><span class="line"><span class="tag">&lt;/<span class="name">script</span>&gt;</span></span><br></pre></td></tr></table></figure>
</li>
<li><p><em>双括号(<code>Mustache</code>语法)是最基本的文本插值方法,它会自动将我们双向绑定的数据实时显示出来,例如 :</em></p>
<figure class="highlight html"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br></pre></td><td class="code"><pre><span class="line"><span class="tag">&lt;<span class="name">div</span> <span class="attr">id</span>=<span class="string">"app"</span>&gt;</span>&#123;&#123; message &#125;&#125;<span class="tag">&lt;/<span class="name">div</span>&gt;</span></span><br><span class="line"></span><br><span class="line"><span class="tag">&lt;<span class="name">script</span>&gt;</span></span><br><span class="line"><span class="actionscript">    <span class="keyword">var</span> vm = <span class="keyword">new</span> Vue(&#123;</span></span><br><span class="line"><span class="actionscript">	el: <span class="string">'#app'</span>,</span></span><br><span class="line">	data: &#123;</span><br><span class="line"><span class="actionscript">		message: <span class="string">'Hello Vue!'</span></span></span><br><span class="line">	&#125;</span><br><span class="line">&#125;);</span><br><span class="line"><span class="tag">&lt;/<span class="name">script</span>&gt;</span></span><br></pre></td></tr></table></figure>
</li>
</ol>
<p><em>📖 参考,推荐书籍 :</em></p>
<ul>
<li><em>《Vue.js实战》—— 梁灏 · 编著</em></li>
<li><em>《Vue.js从入门到项目实战》—— 刘汉伟 · 编著</em></li>
</ul>

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